wil6210: fix error path in wil_tx_vring

Release fragments in the order of allocation; including one for skb head

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Git-commit: c2a146f61014543fc4b52acaddcaa31b9f17453d
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Liron Kuch <lkuch@codeaurora.org>